Causation does not equal correlation.
Just because he "got jacked" doesn't mean that was what caused him not to win a major from 2015-2024.
There are so many reasons other than "he was too jacked to make good swings under pressure" as to why he didn't win from 2015-2024.
First, winning a major is HARD. It requires a lot of luck and things to go your way over the course of 72 holes.
Second, there were so many good players that came along and won majors during that time period. The longer time goes on the harder and harder it becomes to win because the skill level of professional golfers as a whole increases over time.
Third, sometimes you straight up get beat, like in 2022 Rory lost to Cam Smith who shot an 8 under 64 in the final round. Rory shot a bogey free 70 and hit every single GIR.
There were plenty of other things besides "he got too jacked to make good swings under pressure" as to why he didn't win from 2015-2024.
In fact, since the 2015-2016 season, Rory has been inside the top 10 in Strokes Gained Tee to Green EVERY SINGLE SEASON. Think about that for a second. 9 straight seasons he was in the top 10 of a key statistical area measuring full swings and you're trying to argue that he was too jacked to make good swings under pressure while offering no facts or stats that support your claim in any way?? C'mon man that's a horrible take.